ar X iv : a st ro - p h / 97 06 17 7 v 2 1 9 Ju n 19 97 A Theoretical Calibration of 13 CO LTE Column Density

ar X iv : a st ro - p h / 97 06 17 7 v 1 1 7 Ju n 19 97 A Theoretical Calibration of 13 CO LTE Column Density

In this work we use models of molecular clouds (MC), and non-LTE radiative transfer calculations, to obtain a theoretical calibration of the relation between LTE CO column density and true column density in MCs. The cloud models consist of 3 dimensional grids of density and velocity fields obtained as solutions of the compressible magneto-hydrodynamic equations in a 128 periodic grid in both th...

ar X iv : a st ro - p h / 97 06 19 2 v 1 1 8 Ju n 19 97 Metal Abundance in the Solar

It is shown that the metal abundance in the solar interior is constrained from the current solar neutrino experiment, even if one allows neutrino conversion in the sun due to neutrino oscillation. The result shows that the metal abundance in the interior should be within the range 0.4–1.4 times that in the surface, supporting the idea that the sun formed by a contraction of a gas cloud with an ...

ar X iv : a st ro - p h / 97 06 24 4 v 1 2 4 Ju n 19 97 GRS 1915 + 105 : Flares , QPOs and other events at 15 GHz

Monitoring with the Ryle Telescope at 15 GHz of the Galactic X-ray transient source GRS 1915+105 has revealed a remarkable range of rapid and extended flares which appear to be related to the X-ray emission as recorded by the RXTE all-sky monitor. Quasi-periodic oscillations in the range 20 – 40 min have been found and are probably related to oscillations in the soft X-ray flux.

ar X iv : a st ro - p h / 96 06 17 9 v 1 2 9 Ju n 19 96 LECTURE 1 Coalescence of Binary Neutron Stars

ar X iv : a st ro - p h / 97 01 22 8 v 1 2 9 Ja n 19 97 Large - scale Structures revealed by Wavelet Decomposition 1